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Finding the Fourth Proportional to 22,570, 31,139.40 and 14,618.32

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Solution

The fourth proportional to 22,570, 31,139.40 and 14,618.32 is: 20,168.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,570 : 31,139.40 = 14,618.32 : x
  2. Step 2: Convert to fraction form
    22,570/31,139.40 = 14,618.32/x
  3. Step 3: Cross multiply
    22,570x = 31,139.40 × 14,618.32
  4. Step 4: Simplify right side
    22,570x = 455,205,713.81
  5. Step 5: Solve for x
    x = 455,205,713.81/22,570
  6. Step 6: Final answer
    x = 20,168.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.